Haust-pipe of locomotives



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- timidi tda Letters Patent No. 113,299, dated April 4, 1871.

IMPROVEMENT IN AUTOMATIC APPARATUS FOR OPERATING THE VALVE OF THE EX HAUST-PIPE OF LOCOMOTIVES.

The Scheule referred to in these Letters Patent and making parl: of the same.

To all persons to whom these presents may come:

Be it known that I, RALPH Cnoss Husn, Jr., of Georgetown, of the county of Essex and State of Massachusetts, have invented a new and useful Automatic Apparatus for Operating the Valve of the Exhaust-Pipe of a Locomotive Steam-Engine; and do hereby declare the same to be fully described in therfollowing specification'and represented in the accompanying drawing, of which- 'Figure l is a top view;.

Figure 2, a side elevation; and n Figure 3,-a vertical'and longitudinal section of the said apparatus as combined with a blast-pipe.

in such drawing- A denotes the blast-pipe, which receives the wasteV steam from the engine and discharges it into the chimney for the purpose of promoting the draught thereof, and the discharge of the smoke and waste gases.

VOn the top ofthe said pipe is a valve or slide-gate, B, arranged t0 slide horizontally between parallel ways or guides C C, xed to the top of the pipe.

The upper arm of a lever, C', is extended through a slot in the valve, `such lever being arranged as shown, and pivoted to projections D D, extending from the blast-pipe, and serving to support a small steam-engine cylinder, E, provided with a piston, F. The piston-rod is linked to the lower 'arm of the lever Fromthe fulcrnm or shaft a of the lever, an arm, '11, provided with 'a Weight, c, is extended, in manner as shown. v A'ppe, H, opens at one end into the steam-cylin der, in'rear of the piston, and leads from the pipe I, by which steam is supplied from theA boiler oi' the locomotive tothe steam-chest of. the engine driving-cylinder.

The pipe H should open out of the supply-pipe I in advance of the main valve of' such pipe, in order that, on the instant, or immediately after the said valve `may be opened to introduce steam into the steam-chest for the purpose of giving motion to'l the piston of its cylinder, steam may be caused toiow iuto'the' auxiliary cylinder E and operate its piston so as to force it forward and thereby open the valve 'of the blast-pipe, such valve being closed-` by the action of the weighted arms theiustant, or immediately after, the saidmain valve maybeclosed, so as to shut oistcauifrom the chest ot' the engine-cylinder.

rlhe object oi' so closing the blast-pipe is to prevent` cinders, smoke, or gases ii'om being drawn into the cylinder or steam-chest when the engine may be next.

started either forward or backward.

It will be seen from the above that the apparatus Works automatically to open and close the valve of the blast-pipe, no attention of the engineer being required to it, for ou his opening the main valve to let' steam to the engine-cylinder,steam will simultaneously flow into the steam-chest and into the auxiliary cylinder7 and the valve lof the blast-pipe will be drawn from over it, so as to increase it, the Vclosing ofthe valve being eected at the time of shutting oi' the ln the pipe H is a cock, as shown at h, 'which isl provided with an arm, t', extended from its plug.

From this arm t' a rod,'k, is to project outside of the smoke-arch, and to a rock-shaft operated by the link motion ofthe engine when the latter is reversed.

The purpose of the small damper or valve f is to allow the escape of exhaust steam when the'blastpipe is closed by main damper. The purpose of the cock in the pipe H and its operative mechanism is to shut loii"`steam from the auxiliary cylinder E when the engine is reversed with back steam, the cock being opened when the link motion is next moved forward.

1. The arrangement and combination of the auxiliary-cylinder E and its piston F, the lever C and weighted arm Vbpwith the blast-pipe A and its valve B.

"2. The combination of the auxiliary cylinder E and its4 piston F, the lever C', and weighted arm b with theblast-pipe A'and its valve B, the conduit H and the main steam-supply pipe I of the steam-chest oi thedriving-oylinder of a locomotiveengine, all being substantially as speciiied. y

3. The combination of the aperture e and smaller damper or valve f and the cock h, to be operated as described, with the valve B, the blast-pipe A., and

the auxiliary cylinder E iston F weifhted arm b 1 p 1 a r lever G,and conduit H, connected with the supplypipe I, all as set forth.

RALPH C. HUSE, JR.

Witnesses:

R. H. EDDY, S. N. PIPER. 

